Content of CCard scrolling when using a v-row

[ItsPierre]

Describe the bug
When using the CCard with the property scrollable enabled (or just when using a CCardDialog and the content being a v-row the content will scroll 2px even if it doesn't have to scroll.

To Reproduce
Steps to reproduce the behavior:

1. Build a CCardDialog
2. Use a v-row in the default slot
3. Open the dialog and see, that the scrollbar appears

Expected behavior
The content should only scroll, if it really needs to.

Additional context
A temporary fix is to use class my-0 for the v-row.